Very pleasant logic, but very very difficult and hard. The task si simple, from one golden place one small yellow line goes and goes until it gets to one blue ball. This ball gives the line different direction and so it flies again until it gets into another blue ball. You have to connect all blue spots and get the line back where it begun. When the yellow thing gets out of the game area you must repeat the level. If you don't connect all the blue balls you loose too.